Vulcanizing press



Oc't. 5 1926. ,Y v 1,601,716

G. w. BULLEY vULcANvzNG PRESS Filed Jan. s, 192e atboznuj Patented Oct. 5,1926e UNITED sT W. BULLEY, oF-ALKRoN, oHIo,

ATEs

GEORGE PATENT OFFICE.;

ASSIGNOR TO THE MILLER RUBBER COMPANY,

oFAKnoN, OHIO', A conPoBA'rIoN or o HIo.--

" 'VULCANIZING PRESS.

Application fil-ed January ingly simple, durable andefficient press in which the plastic material may be automatically shaped around the core and thus held during vulcanization, and vin which on the reverse action of the press7 the core orl cores will be started or cracked loose from the vulcanized article before the latter is released by the mold walls.v

With these and; other objects in view7 the invention includes the novel features of construction and. arrangement and ycombination of parts hereinafter described, and particularly defined by the appended claims.

What I at present consider the preferred embodiment-of said invention is illustrated in the accompanying drawing, in which- Figure v1 represents an elevation of the press with parts in' section. I

Fig. 2 is a sectional view of the intermediate portion7 at right angles to Fig. l, and Fig.,3 is a horizontal section.

Referring by reference characters to this drawing, the press is shown as comprising a base 1 including a ram cylinder 2 and ram piston 3 movable therein in the usual manner, and carrying at its upper end the movable platen 4. y5 designates the press head supported from and tied to the base by the rods 6 in the customary manner, four of such rod`s` being used, one at each corner of the press though only two show. The platen is preferably slidably guided by the rods passing through vertical holes in the corners of the. platen.

The head 5 carries on its under acea mold plate 7, which is preferably removably secured thereto in any suitable manner, as by bolts, to permit its removal and replacement, which attachment may be made by tap screws, and it is provided with a steam chamber 7a to which steam may be admitted by a', pipe leading to a source .of steamsupply (not shown). A y

To the four edges of this mold plate 7 are secured four mold plates 8 for forming the i sidesand ends of the mold, these plates bengfgaijticulated on loose hinge pins 8a and,

s, i926. serial no. 80,096.

being tapered on their outer edges to cooperate with the tapered walls 10a of a mold clamping member 10. In the present case two sets of mold ing two articles.v

The front mold member 8 is omitted to show the int/eriorfaces of the others.

The mold clamping member l0 is slidably guided by the rod 6 by reasonof having horizontal projecting portions 10b provided with vertical holes throughjwhich the rods or posts 6 pass.

Encircling each of the posts' between the projections l0 and the platen is 'a helical compression spring 11, these springs tending to keep the clamping member ieldingly. supported a certain distance a ove the platen; The walls of themold clamping member are provided with steam chambers 10c to which steam may be supplied by flexible pipe connections (not shown).

Detachably secured tothe platen 4` is a mold closure member 9 designed to cooperate with the free edges, of the hinged mold y-sections to complete the mold cavity, and this plate 9 carries the core means for shaping the inside of the box. l In the example shown in the drawin vthe core means is Plates, are shownffor forrn-w Y shown as com osing t ree core members 12 j for forming a. x having three cell compartments, which-is the most usual form of battery box.` A

The core members are provided with steamcavities -to which steam may be admitted by flexible pipes (notshown) connected to passages -9a in the plate 9.

In operation, andwith the parts in the position shown in the'drawing, a lump or batch of hard vulcanizing rubber compound is placed on top of the core members, the quantity being preferably determined Y by weight, and the ram is elevated to move the platenupwardly. In the upward movement the mold sections-8 first enter the cavity 10a .of the clamping' member, the inclined walls of which, cooperating with the inclined outer faces of the mold sections, causes the latter to be Iforced together at the corners making a tight closure.

On further upward movement of 'the ram,

By 'the timetbe limit of upward movement is reached the plate 9 closes the lowerend down before the mold clamp 10 starts to move and thus the core is cracked loose from the molded article before the latter is reinjuring the article..I

leased by the mold and wthoutldan'ger of Furtherv downward movement of the rain allows the clamp` 'to drop to the position shown in the dawing, whereupon the article may be removed from the mold by swinging 'l head,l a mold carried thereby including mov.

one or more of`tl1elmold sections outwardly.

Having thus described my invention, what 1. A vulcanizing press having a xed able side plates, a moldr clamping member mounted for movement vertically of the press and adapted, when moved upwardly,

. to engage and clamp the lmold'sides, a ram,

head, a base mold plate carried thereby, side moldlplates hinged to said'basemold plate and having inclined outer faces, a mold clamp mounted for movement vertically of the press and having inclined inner walls to coact with said side mold plates, a ram .carrying a mold closure plate and core means, and yielding pressure exerting means interposed between theram and mold clamp.

`3. A vulcanizing press having a fixed head supported by corner posts, a moldbase carried by said head, mold sides hinged to said base, a mold clamp slidably carried by said osts, and adapted to clamp the sides toget er, a ram, a ress platen operated by said ram and guided by Asaid osts, mold closure and core means carried y said platen, and helical springs encircling the posts between the mold clamp and platen.` p

In testimony whereof I affix my signature.

' GEORGE W. BULLEY 

